module twoxor(
  input a,
  input b,
  output f
);
  assign f = a ^ b;
  initial begin
    if ($test$plusargs("trace") != 0) begin
	    $display("[%0t] Tracing to logs/vlt_dump.vcd...\n", $time);
	    $dumpfile("logs/vlt_dump.vcd");
	    $dumpvars();
    end
    $display("[%0t] Model running...\n", $time);
  end
endmodule

